Lavatory basin



FIG. 1 is a perspective view of the lavatory basin;

FIG. 2 is a right side elevational view of the lavatory basin, the left side elevational view being a mirror image of the right side elevational view;

FIG. 3 is a front elevational view of the lavatory basin;

FIG. 4 is a rear elevational view of the lavatory basin;

FIG. 5 is a top plan view of the lavatory basin; and,

FIG. 6 is a bottom view of the lavatory basin. 

The ornamental design of a lavatory basin, as shown and described. 